Paper-making machine



A. J. HAUG.

PAPER MAKING MACHINE.

APPLICATION mm FEB. 5. I917.

,3 3,505, Patented June 15,1920.

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A. 1. HAUG. PAPER MAKING MACHINE.

APPLICATION FILED FEB. 5. 1917, 1,343,505. Patenwd-Tlme 15, 1920.

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PAPER MAKING MACHINE.

APPLICATION FILED FEB. 5, I917- 1,343,505. Patented J n 15, 1920.

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A. J. HAUG.

PAPER MAKING MACHINE.

APPLICATION FILED FEB. 5. I912.

1,343,505. Patented June 15, 1920.

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PAPER MAKING MACHINE.

APPLICA ION FILED FEB. 5,1917.

1,343,505. Patented June 15,1920.

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iITED STATES OFFICE.

ANTON d. HAUG, 0F NASHUA, NEW HAMPSHIRE, ASSIGNOR T0 IMEBOVEID PAPER MACHINERY COMPANY, OF NASHUA, NEW HAMPSHIRE, A CORPORATION OF PAPER-MAKING MACHINE.

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Specification of Letters latent.

Patented June 15, 1920.

To all whom it may concern:

Be it known that I, ANTON J. HAUG, a citizen of the United tates, and resident of Nashua, county of Hillsborough, State of New Hampshire, have invented an Improvement in Paper-Making Machines, of which the following description, in cdhnection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to apparatus for separating from the liquid carrier the web forming material of pulp stock in paper manufacture. For purposes-of illustration, the invention is shown herein as applied to a decker, but certain features thereof have application to other types of pulp handling machines. The invention will be best understood by reference to the following description when taken in connection with the accompanying illustration of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

lln the drawings:

Figure 1 is a transverse, sectional elevation of a decker embodying one form of the invention;

Fig. 2 is an end elevation of the same machine;

Fig. 3 is a plan view partically broken away of the decker shown in Fig. 1;

Fig. 4 is a longitudinal sectional elevation of the same decker;

Fig. 5 is an enlarged plan View showing certain of the couch roll adjusting connep tions;

Fig. 6 is a longitudinal sectional elevation of the connection shown in Fig. 5;

Fig. 7 is a detail showing the couch roll supports with the doctor adjusted for rotation of the couch roll in the opposite direction to that shown in Fig. 1; and

Fig. 8 shows the arrangement of belt tightening arm when the cylinder and couch roll are reversely driven.

Referring to the drawings and to the embodiment of the invention therein illustrated, the deckertherein shown comprises a main frame or casing 1 forming a tanklike structure, the ends of which are closed by the end plates 2 and 3, the latter carrying suitable bearing supports for the shaft 4 which carries the screen or cylinder mold 5, the latter of any suitable or usual con struction. The cylinder 5 is driven by the driving gear 6 (Fig. 4.),which latter meshes with a pinion (not shown) on the main driving shaft 7 (Fig. 3) to which driving power is imparted through the driving pulley 8, by any suitable means.

The cylinder 5 is adapted to rotate within the pulp tank 10, the bottom of which is formed by the casing wall 11, the pulp being fed to the tank through the stock supply inlet 12 (Fig. 1) where it passes over a perforated plate 13 which helps thicken the stock by extracting more or less water. The water passes through the plate into the water chamber 1a, whence it is drained.

away through any suitable passages. The ends of the pulp tank 10 are partly closed by the end plates 15 and 16 which prevent the stock from passing directly into the waste canal or chamber 17 beneath the stock tank 10. The end plates 15 and 16, however, have the exit openings 18 and 19 com municating the open ends of the screen drum with the interior thereof so that the strained water which has passed from the tank through the screenfiows through the exit openings in the end plates into the respective compartments at the opposite ends of the casing 2 and down into the waste tank 17 whence it is carried off through suitable discharge passages indicated at 20, to any suitable receptacle which may be ,a save-all or some other device for saving the wood fiber.

The stock after being carried to the tank through the pulp supply is deposited upon the rotary screen 5, the water passing through the screen and into the underlying waste tank 17 and the web of pulp thus formed on the screen being carried up and removed by the couch roll 21 located above the screen. In the described embodiment of the invention the pulp is removed from the couch roll by the doctor 22 and caused to fall upon the underlying deflector plates 23 and 24, whence it passes into any suitable receptacle, such as the conveyer or tank 25 (shown in dotted lines) through which the thickened or deckered stock is withdrawn through any suitable means.

When machines of this type are shut down it has been a common practice to withdraw the residue of stock in the pulp tank, the residue withdrawn being emptied on the floor where the machine stands and carried with other waste into the sewer. Herein l have provided means whereby when the machine is shut down, the residue may be withdrawn and diverted into the white Water chamber, whence it may be conducted with the white water to a save-all or suitable device for saving the wood fiber. For this purpose the end plate 15 of the pulp tank 10 (see Figs. 2 and 4) is pro. vided with a sliding gate 26 adapted to open or close the orificein the end plate, such gate being moved by means of the lever 27 having the easily accessible handle 28. In the normal operation of the machine the gate is closed, the lever standing in the position shown in Fig. 2. When the machine is shut down the gate may be opened by moving the lever 27 to the right of the position shown in Fig. 2, thereby permitting the pulp residue to flow from the tank 10 into the underlying white water chamber 17 and out through the discharge pipe 20.

Referring now to the support for the couch roll 21 and the connections for adjusting the same to or from the cylinder, the couch roll is carried upon the couch roll shaft 30, opposite ends of which are mounted each in suitable bearings 31 which are carried upon a tilting couch roll frame 32. Each tilting frame member 32 is supported for rocking movement upon pivot pins 33 (Figs. 2 and 4) which are carried by fixed end supporting brackets 34, each bracket being bolted to the top of the corresponding end plate 15 or 16 and being split or bifurcated, the tilting frame member 32 being carried between the two portions of the bracket. It will be obvious that the construction is such that the couch roll frame members 32 may be rocked about the pins 33 so as to bring the couch roll nearer or farther away from the face of the cylinder 5.

Suitable means are herein provided to secure this adjustment of the couch roll, such means being specifically herein as follows: Each tilting frame member 32 is extended above the pivotal support 33 as shown in Fig. 4 to form an annular carrier 35 between the two opposite sides of which is supported by means of suitable studs or trunnions 36 a small, cylindrical shaped member 37 which may be moved forward or backward to swing the tilting frame and adjust the couch roll by means of the threaded rod 33 (see Figs.,5 and 6). The threaded rod carries at its end (see Fig. 6) the small piston or plunger 39 working within the chamber of the cylinder 37, there being provided a second piston 40 facing the piston 39 and provided with the plunger 41 pressed into contact with the piston 39 by means of the compression spring 42.

In order that turning movement of the screw shaft 38 may advance or retract the tilted frame, the shaft has threaded engagement with a nut 43, which latter (as is shown at the left in Fig. 4 and in Figs. 5 and 6 where the annular carrier 35 is broken away) is supported upon studs 44 carried inthe two upright extensions 45 of the end supporting brackets 34.

To turn the screw shafts 38, each one of the latter has at its opposite end a bevel gear 46 meshing with a similar gear on the transverse shaft 47, the latter being provided with hand wheels 48. By turning either hand wheel, both threaded shafts 38 are simultaneously turned, causing them to advance or retract in the threaded nuts 43. When the screw shafts are retracted by suitable rotation of the hand wheels, the cylindrical members 37 are forcibly retracted, the tilting frame swung back and the couch roll lifted farther away from the cylinder mold. When the screw shafts are advanced, the tilting frames are allowed to rock forward and the couch roll to descend, the wire in the cage bringing it into closer contact with the cylinder. There is thus provided delicately adjustable means for positively raising the couch roll more or less" and adjusting its distance from the cylinder, the adjustment being had by a simultaneous movement at each end of the roll so the roll maintains its true parallel relation at all times to the cylinder. Any abnormal pressure which occurs between the couch roll and the surface of the cylinder mold and which tends to lift the couch roll is taken care of by the compression spring 42, such spring simply yielding and permitting the cylinder to slide back on the threaded shaft. The compression of the spring may be regulated by the threaded head 49 in the end of the cylinder 37. The nut 43 is preferably mounted upon the studs 44 so as to be susceptible of a slight rocking movement, as is also the cylindrical member 37 upon the studs 36 so as to adapt the osition of these parts to the adjustment 0 the couch roll supporting frame.

Herein the doctor 22 is so supported as to provide for an adjustment which maintains the angle or bevel of the doctor substantially the same with reference to the couch roll. To support the doctor each tilting frame member 32 is again prolonged above the annular carrying portion 35 to provide a horizontally extending boss 50 in which is mounted a pin 51 carrying at the outside end the weighted arm 52 and at the inside end the hub 53 of the depending doctor supporting arm 54. The depending supporting arms 54 are longitudinally slotted at 55 (indicated in Fig. 1), open ends of the doctor blade 22 being secured to the arms by means of bolts 56 passing through the slots 55. By means of the bolts 56 passing through the slot 55 the position of the doctor may be changed lengthwise the slot the adjustment taking place along a line tangential to the couch roll so that the angle of the beveled edge of the doctor with relation to the couch roll remains substantially the same in any position of adjustment. The trunnion pins 51 which support the doctor being carried upon the tilting frame members 32, the doctor has an unvarying relation with reference to the couch roll in the various adjusted positions of the latter. At the same time the docto'r'is susceptible of movement with relation to the couch roll, being yieldingly pressed against the face of the latter by means of the weighted arms 52, the pressure of which may be adjusted by adjusting the 'pbsition of the weights thereon.

One feature of novelty is the provision of means whereby the decker may be rotated in either direction. Under some conditions it appears to be desirable to rotate the screen drum in the pulp tank in the direction of the entering stock and under other conditions to rotate the drum away from the entering stock. The described embodiment of my invention is so arranged that this rotation may be had in either direction.

The adjustments of the machine have been described for rotation of the cylinder and the couch roll which correspond to the arrow heads shown in Fig. 1, that is to say for a rotation of the screen drum toward the stock entering the tank. If it is desired to reverse the rotation of the screen drum and the couch roll, the position of the doctor with reference to the couch roll is reversed, the doctor in its reverse position being shown in Fig. 7.

To provide for this reversal, each tilting frame 32 has a projection extending rearwardly and downwardly and carrying the boss 57 which corresponds to the boss 50 at the top of "the frame. To reverse the position of the doctor, the trunnion pins 51 which support the slotted supporting arms for the doctor are withdrawn from the bosses 53 and placed in the bosses 57, giving the doctor the position shown in Fig. 7. When-thus located the doctor is in a position to remove the pulp from the couch roll when rotating in a right-handed direction, as viewed in Fig. 1. V

The couch roll may be driven by any suitable means, but herein is driven by the driving belt 60 (see Fig. 2) which passes over the driving pulley 61.(see Figs. 2 and 3) on the couch roll shaft 30'and also over a driving pulley 62 at one end of the main drive shaft 7. The diameters of the driving and driven pulleys and those of the driving gears for the main cylinder are preferably selected so that the couch roll is driven at a roll and at the same time lengthening the life and durability of the screen. In order to adjust this surface speed as required, the

pulley 61 may be expansible in form, or anyother speed adjusting device may be employed if desired.

In order to impart greater driving efiort to the couch roll driving belt from the driving pulley 62, the idler pulley 63 may be employed carried by the swinging arm 64 mounted on the main drive shaft 7 and having secured thereto the weighted arm 65 provided with the counterweight 66 which tends to draw the idler pulley down into contact with the belt 61 and both tighten the same and increase the driving effort. When the machine is operated under conditions where the rotation of the cylinder mold 5 is reversed, the idler pulley 63 and the weighted arm are adjusted in relation to the belt to some such position as is shown in Fig. 8.

Under some conditions of operation it may be desirable to withdraw the thickened deckered stock in the stock tank and to convey it at times into the inlet stock tank or at other times to the receptacle which receives the thickened stock from the couch roll. a portion of the stock in the tank being thick enough to pass out with the thickened stock. To permit the overflow of the thick ened deckered stock either to the inlet tank or to-the conveyer tank 25 at will, I have provided an overflow plate 70 near the top of the stock tank and at the opposite side thereof "from the stock supply passages. On

flow from the tank is thick enough to pass out with the thickened stock from'the couch roll. For example. when the decker is onerated with a left-handed rotation of the cylinder mold, as viewed in Fig. 1, the stock may be thick enough at the overflow plate 70 to warrant the deflection of the thick-- ened overflow into the conveyer tank 25.

The plate 71. however, is removable and, when removed, the overflow will gravitate into a suitably positioned underlying passage 72, and through suitable passages (not.

herein shown) into the inlet stock tank.

when the plate or gate 71 is removed, there.-

fore, the overflow is carried back into the inlet stock and with the stock supply into the tank 10.

Before the decker is shut down it is necessary to remove the stock from the cylinder mold in order that it will not dry thereon and clog up or close the openings in the screen. Such removal may be readily accomplished by means of a steam jet applied to the ascending side of the cylinder over the side which approaches the couch roll. In case left-handed rotation (as viewed in Fig. 1) however, is resorted to, it is ordinarily diflicult or impossible to apply a steam jet to the ascending side of the cylinder since the latter is concealed or covered by the conveyer or deflecting plates from the couch roll. In the described form of decker, however, provision is made for the insertion of a steam jet through a suitable opening,

such opening being herein provided between the two stages or plates 23 and 24 of the two-stage deflector. The space between such deflecting plates is large enough to permit the insertion of a team nozzle between the same and provi e a blast of steam against the cylinder onto the ascending side of the screen to clean it.

While I have herein shown and described bodiment of the invention, it is to be understood that extensive deviations may be '-made therefrom and from the mechanical details herein shown, and from the relative arrangement of parts, all without departing from the spirit of the invention' Claims. v I

1. In a paper making machine, the combination with a pulp tank and a rotary screen therein, of an overflow tank for the screened white water, and normally closed means for discharging the pulp residue of the tank at will to the white water chamber.

2. The combination with a pulp, tank, a rotary screen therein, a'chamber to receive the screened'white water on the pulp tank, and means for opening the pulp tank directly to'the white water chamber.

3., The combination of a pulp tank, a rotary screen therein, discharge passages to receive the screened white water from the tank, a pulp receiving receptacle, and means to 'drain the pulp residue from the tank into 4 the receptacle.

' roll.

4. In a decker, a cylinder mold, a pulp tank, a recovery receptacle, and means for draining the pulp residue into the recovery receptacle.

5. Ina paper machine the combination with a stock tank, a rotary screen drum therein, a couch roll and a doctor cotiperating with the couch rolland having an edge adjustable in a plane tangential to the couch 6. In a paper machine the combination with a screen drum and couch roll, the latscreen drum, and a doctor also carried by' said supporting members but adjustable along a substantially tangential line with reference to the couch roll.

8. In a paper machine, the combination with a couch roll of a doctor blade, supporting members on which said doctor blade is adjustable to vary the region of contact between the doctor blade and the couch roll,

and means for swinging the doctor blade supports to press the doctor blade against the couch roll.

9. In a paper machine, the combination with a stock tank, a rotary screen drum, a couch roll, ofa doctor blade, supporting members therefor on which said doctor blade is adjustable to vary the region of contact between the same and the couch roll, means supporting said supporting members for swinging movement, and a weighted arm to swing the members to press the doctor blade against the couch roll.

- having a reversible position whereby it may be used with the couch roll irrespective of the direction of rotation of the latter.

12. A paper machine having a pulp tank, a rotary screen drum, a couch roll cooperating therewith, and means to move the pulp from the couch roll, the said machine being capable of operation with the drum and couch roll rotated in either direction.

13. In a paper machine, a couch roll having a reversible doctor blade to adapt itself to the rotation of'the couch roll in either direction.

14. In a paper machine, the combination with a screen drum of a couch roll, a tilting frame, means for adjusting the frame to vary the pressure of the couch roll on the screen drum, and a plurality of doctor blade supports carried by said frame whereby the doctor may be operatively presented to the couch roll irrespective of the direction of rotation of the latter.

15. In a paper machine, the combination with a pulp supply tank, a rotary screen drum therein, a couch roll, means to supply stock to said tank, a receptacle to receive thickened stock from the couch roll, said tank having an overflow, and means to divert the overflow tothe receptacle for the thickened stock at will.

16. In a paper machine, the combination with a pulp supply tank, a rotary screen drum therein, a couch roll, means to supply stock to said tank, a receptacle to receive thickened stock from the couch roll, said tank having an overflow," and means to divert the overflow to the receptacle for the thickened stock or to the pulp supply at will.

17. In a paper machine, the combination with a pulp tank, a rotary screen drum therein, a couch roll, a receptacle to receive thickened stock from the couch roll, said tank having an overflow passage to convey the overflow into the stock supply tank, and a movable wall or gate to divert the overflow at will into the receptacle for the thickened stock. 1

18. In a paper machine, the combination with a pulp tank having a stock supply, a rotary screen drum therein, a couch roll cooperating with the drum, a receptacle to receive the thickened stock, said tank having an overflow and means for conveying the overflow to the stock supply.

19. A paper machine having a pulp tank, a rotary screen therein, a couch roll, a doctor and a receptacle for the thickened stock from the cbuch roll, said tank having also an overflow and means to convey the overflow at will, either to the said receptacle or to a passage leading elsewhere than to the receptacle for the thickened stock.

20. In a paper machine, the combination with a tank 10, a screen drum 5, and a couch roll 21, of the overflow plate 70, gate 71 and passage 72.

21. In a paper machine, the combination with a. pulp tank of a rotary screen drum, a couch roll cooperating therewith, a doctor operatively related to the couch. roll and a deflector to raise the thickened stock from the couch roll, said deflector having a 1ongitudinally extending, cleaning opening therein whereby the surface of thecylinder may be cleaned.

22. A paper machine having a pulp tank a rotary screen drum therein, a couch ml and doctor, and a two-stage deflector to raise the thickened stock permitting cleaning access to-the screen drum,

23. In a paper machine, the combination with a pulp tank having means for supplying stock at one side thereof, a rotary screen in said tanka a'couch roll cooperating with the screen, a doctor operatively related to the couch roll for removing the thickened pulp, means at the opposite side of the tank from the stock supply means for conveying the thickened pulp, and an opening at said opposite side through which a suitable cleaning agent may be applied to the screen.

24. In a paper machine, the combination with a tank 10, a screen 5, couch roll 21 and doctor 22 of the-two-part deflector 23, 24.

25. In a paper machine the combination with a couch roll of a screen drum, said screen being driven by means other than the couch roll, a supporting frame for the couch roll which holds the latter yieldably toward the drum: and means for accurately adjusting the frame positively to move the couch roll more or less away from the frame, said couch roll being thereby held at an adjustable minimum distance from the drum but movable away from the drum.

26. In a paper machine, the combination with a screen drum of a couch roll, a supporting frame for the couch roll which permits the latter to gravitate in contact with the drum, and a threaded adjusting device for positively lifting the couch roll more or less away from the drum.

27. In a paper machine, the combination with a pulp tank, a screen drum therein, a couch roll cooperating with the drum, a tilting frame for the couch roll, a fixed support for the tilting frame, a threaded adjusting member engaging the tilting frame and also the fixed supporting member, and means for turning said threaded adjusting member.

28. The combination with a cylinder drum, of a couch roll, a couch roll supporting frame and means for adjusting said frame comprising a threaded adjusting member having engagement with the couch roll frame to a compression spring.

29. In a paper machine, the combination with a pulp tank,'a rotary screen therein, a chamber adapted to receive the strained liquid which is passed from the tank through the screen, and means at will for conveying to said receptacle the unscreened residue in said tank.

30. A paper machine having a pulp tank, a screen therein, an overflow chamber for the strained liquid which has passed from. the tank through the screen, and a gate in the lower part of the tankadapted to be opened to open the tank to said overflow chamber. a

31. In a paper machine, the combination with-a pulp tank, a rotary screen therein,

with a stoc tank 10, a rotary screen '5, a

couch roll 21 a doctor 22, a tangential adj ustment holder 54, and a weighted arm 52.

33. In a paper machine, the combination with a tank 10, a screen drum 5, a couch roll 21, a doctor 22, and the supports 50 and 57 for carrying the doctor in opposite relations to the couch roll.

34. In a paper machine the combination with a tank 10, a rotary screen 5, a couch roll 21, a doctor 22, a deflector 24:, and the cleaning opening therein.

35. In a paper machine, the combination with a drum, a couch roll, a couch roll support, and means for adjusting said support at each end simultaneously to adjust the relation of the couch roll to the screen.

36. In a paper machine, the combination with a pulp tank, of a screen, a drum, a couch roll, a couch roll supporting frame,

threaded adjusting devices at opposite ends of said frame, means for turning said devices simultaneously to adjust the couch roll with relation to the screen while maintaining the same parallel therewith.

37. In a paper machine, the combination with a pulp tank, of a screen, a drum, a couch roll, a couch roll supporting frame, threaded adjusting devices at opposite ends of said frame, means for turning said devices simultaneously to adjust the couch roll with relation to the screen while maintaining the same parallel therewith, and a yieldable connection between said adjusting devices and said couch roll support.

In testimony whereof I have signed my name to this specification.

ANTON J. HAUG. 

